/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hugegraph.store.node.grpc.query;

import java.util.Iterator;

import org.apache.hugegraph.store.node.grpc.query.model.PipelineResult;
import org.apache.hugegraph.store.node.grpc.query.stages.EarlyStopException;

public interface QueryStage {

    /**
     * init params
     *
     * @param objects params
     */
    default void init(Object... objects) {
    }

    default PipelineResult handle(PipelineResult result) throws EarlyStopException {
        return null;
    }

    default boolean isIterator() {
        return false;
    }

    default Iterator<PipelineResult> handleIterator(PipelineResult result) {
        return null;
    }

    String getName();

    default void close() {
    }

}
